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Background: The American collage of Prosthodontics (ACP) classified completely edentulous patients into four classes based on specific diagnostic criteria. The aim of this randomized clinical trial is to compare patient satisfaction scores between ball and CMLOC attachment in class II and class III ACP for a single implant retained mandibular over-denture after 2 weeks of loading 1 and 2 year follow up. Materials and Methods: Eighty completely edentulous patients were recruited from the out-patient clinic of Prosthodontics Department –Cairo University. Patients with Class II and III ACP classification were included . All patients received a single implant in the mid line of the mandible. After a 3 month healing period, patients were randomized using sealed envelopes into ball attachment group and a CMLOC attachment group. Patient satisfaction questionnaire was used to record patient satisfaction for both groups 2 weeks after loading, then 1 and 2 years later. Results: For the Ball group, there was no statistically significant difference – in patient satisfaction scores between both ACP classes at all follow up periods. As for the CMLOC group, no statistically significant difference in patient satisfaction scores was found between both classes 2 weeks after loading, while at 1 year follow up, patients with class III showed statistically significant better patient satisfaction and at 2 year follow up there was no significant difference between both classes. Conclusion: The resiliency of the attachment and the associated denture base rotation seems to have a greater influence on patient satisfaction than the ACP classification.

egyptian dental journal /egyptian dental journal

The effect of two different attachments on patient satisfaction in mandibular class II and III ACP ridges with single implant-retained mandibular overdentures